4008 Barnsley Ln, Olney — tax account 160800739923
Single-family house built in 1970, 2,468 ft² on 0.43 acres in Olney, Montgomery County, assessed at $686,300; last transfer March 19, 2026 for $850,000.
From the State Department of Assessments and Taxation file as published by the Maryland Department of Planning (MD iMAP) — not the official record. Open the official SDAT record.
Account
| Tax account number | 160800739923 |
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| Map, grid, parcel | Map HU34 · Block 9 Lot 9 |
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| Location | 4008 Barnsley Ln, Olney MD 20832 |
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| Jurisdiction | Montgomery County |
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| Subdivision | Olney Mill |
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| Plat | 7703 |
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Land
| Land use | Residential (R) |
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| Zoning | R200 |
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| Acreage | 0.426 acres (18,557 ft²) |
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Structure
| Year built | 1970 |
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| Above-grade area | 2,468 ft² |
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| Style | 2 Story No Basement |
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| Building type | Split Level |
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| Construction | Brick |
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| Quality grade | 4 (on a scale of 1 to 9) |
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Assessment — January 2026
| Land | $268,800 |
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| Improvements | $417,500 |
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| Total | $686,300 |
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Last transfer
| Date | March 19, 2026 |
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| Consideration | $850,000 |
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| Deed reference | liber 68537, folio 0344 |
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What this means
- Maryland reassesses each property every three years; increases are phased in over the following three years, and the Homestead Tax Credit caps the yearly increase on a principal residence.
- Assessed 10% above the median residential account in Montgomery County ($623,400, 248,486 accounts).
- The last transfer price is 24% above the current assessment.
- Built before 1978: Maryland requires rental units built before 1978 to be registered with MDE and to pass a lead-risk reduction inspection.
Parcel point of the Maryland Department of Planning — not a survey.
Data: Maryland Department of Planning / SDAT, MD iMAP Parcel Points, retrieved November 1, 2026. Sources and freshness. No owner names or mailing addresses are published.
The report for account 160800739923
This page shows the assessment record. The report adds what lies around the property: FEMA flood zone, Critical Area designation, wetlands, contaminated land sites nearby and historic properties.
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